CN1251551A - 可透性纤维感薄膜涂层非织造布 - Google Patents
可透性纤维感薄膜涂层非织造布 Download PDFInfo
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Abstract
提供一种可用作个人护理制品用体侧衬里的带缓冲层的吸收材料,由下列构成:膨松非织造布。在该非织造布上挤出了一层薄膜,从而形成层合物。随后,所述层合物接受开孔处理,于是就具有了至多20s的8cc吸入速率和小于1g的回潮。此种衬里可用于尿布、训练裤、妇女卫生制品、吸收作用衬裤及成人失禁用品等用途。
Description
发明背景
个人护理制品用的包覆材料应当将液体从穿戴者传递到该包覆(或衬里)材料下面的各层中,然后该液体被吸收或分配到其他部位。衬里材料优选具有低沾污和低回潮(rewet)的表面以减少衬里材料本身的持液。微孔薄膜因其沾污性较小、回潮低而被作为衬里使用,这在技术上是已知的。然而,它们却不能提供如纤维类非织造布材料那样的柔软和舒适。因此,目前依然存在着对这样一种材料的需求,它们既能提供薄膜基衬里的优点,同时又使穿戴者感觉柔软和舒适。
本发明的一个目的是提供一种带缓冲层的吸收材料,它可用作低沾污、低回潮,并且使穿戴者感觉柔软和舒适的衬里。本发明的另一个目的是使这样的材料还具有比薄膜衬里更高的强度,并且进一步,提高其流体控制功能。
发明概述
本发明的目的是通过一种由薄膜与非织造布制成、可用作衬里材料的带缓冲层的吸收材料达到的,其中薄膜直接挤出到非织造布上以形成层合物,从而赋予薄膜以纤维样的外形和手感。该薄膜/非织造布层合物是通过对层合物实施开孔处理而变得可透的。该非织造布必须是高膨松型的非织造布,以便提供所要求的流体控制功能。
附图简述
给出的附图是本发明薄膜/非织造布层合物的局部剖视图,其中薄膜1层合在非织造布2上,层合物带有微孔3。
定义
“亲水(的)”,形容纤维或纤维表面能被与之接触的含水液体润湿。而材料润湿的程度,则又可用所涉及的液体和材料的接触角及表面张力加以描述。适合用来测量特定纤维材料或纤维材料共混物的润湿性(可湿性)的设备和技术可由Cahn SFA-222表面力分析仪系统或基本相当的系统提供。采用这种系统测量时,接触角小于90°的纤维,就判定为“可湿的”或亲水的,而接触角等于或大于90°的纤维,则定为“不可湿”或疏水的。
“层”,当以单数形式使用时,可具有双重含义,即,单个的要素,或者多个要素。
“液体”是指非气态物质和/或可流动且采取将其倒入其中的容器形状的材料。
本文所使用的术语“非织造布或纤网”是指一种纤网,它具有由许多单根纤维或丝交叉铺置,然而却不是以如同针织织物中那样的可辨认方式,所形成的结构。非织造布或纤网一向采用多种方法成形,例如,熔喷法、纺粘法以及粘合梳理纤网法。非织造布的单位重量通常用每平方码材料的盎司数(osy),或者每平方米克数(gsm),有用的纤维直径通常用μm表示。(注:要由osy数值换算为gsm数值,可将osy数值乘上33.91)。
本文所使用的术语“微纤维”是指平均直径不大于约75μm的小直径纤维,例如平均直径为约0.5μm~约50μm,或更具体地说,微纤维的平均直径可在约2~约40μm的范围。另一种常用的纤维直径表示法是用“旦”,旦数的定义是每9000m纤维的克数,可根据按微米(μm)表示的纤维直径平方后乘上以g/cc表示的密度,再乘上0.00707,计算出来。旦数越低,表明纤维越细,而旦数越高,表明纤维越粗或越重。例如,已知一根聚丙烯纤维的直径为15μm,要换算为旦数,可将该数值平方,将得到的结果乘上0.89g/cc,再乘上0.00707。于是,15μm的聚丙烯纤维的旦数为约1.42(152×0.89×0.00707=1.415)。美国以外的地区,该度量单位以“特(tex)”表示更为普遍,其定义是每1千米纤维的克数。特数可按旦数/9算出。
“膨松”是指非织造布的厚度和密度,指的是当用作微孔薄膜涂层材料中的衬底(底层)时能提供改善的流体控制功能及触觉特性的布料。这种改善的效果可在厚度或膨松度至少约0.03英寸(0.76mm),优选约0.05英寸(1.3mm),且密度约0.03g/cc~约0.07g/cc,优选约0.05g/cc的材料上表现出来。
“纺粘纤维”是指一种小直径纤维,其成形方法是,将熔融热塑性材料从纺丝板的许多细小、通常为圆形的纺丝孔中以丝束的形式挤出,挤出的单丝直径随后被迅速拉细,采用的方法例如可见诸于授予Appel等人的美国专利4,340,563,以及授予Dorschner等人的美国专利3,692,618、授予Matsuki等人的美国专利3,802,817、授予Kinney的美国专利3,338,992和3,341,394、授予Hartman的美国专利3,502,763及授予Dobo等人的美国专利3,542,615。纺粘纤维当沉积在收集表面上时通常不发粘。纺粘纤维通常是连续的,平均直径(取至少10个样品)大于7μm,尤其在约10~20μm之间。
“熔喷纤维”是指这样成形的纤维:将熔融热塑性材料经由许多细小,通常为圆形的纺丝孔以熔融丝或长丝束形式挤出到汇聚的高速,通常是热的气流(例如空气)中,气流将熔融热塑性材料丝束拉细,以减少其直径,可达微纤维级的直径。此后,熔融纤维由高速气流夹带着前进,最后沉积在收集表面上成形为散乱散布的熔喷纤维的纤网。此种方法例如公开在美国专利3,849,241中。熔喷纤维是微纤维,可以是连续的或不连续的,平均直径通常小于10μm,且当沉积在收集表面上时通常为发粘的。
本文所使用的术语“纵向(机器方向)”或MD,是指布料被生产出来的长度方向。术语“横向”或CD,是指布料的幅宽方向,即大致垂直于MD的方向。
“共轭纤维”是指由分开的挤出机挤出但合在一起纺丝,成形为一根纤维的至少2种聚合物源构成的纤维。共轭纤维有时亦称多组分或双组分纤维。这些聚合物通常彼此不同,尽管共轭纤维也可以是单组分纤维。聚合物沿共轭纤维的横断面通常排列在位置基本固定、彼此界限鲜明的(各自)区内,并沿着共轭纤维的整个长度连续延伸。此种共轭纤维的构型例如可以是皮/芯排列的,其中一种聚合物被另一种聚合物包裹着,或者是并列排列的、扇形排列的或海-岛排列的。共轭纤维例如公开在授予Pike等人的美国专利5,382,400中。就双组分纤维而言,聚合物可按75/25、50/50、25/75的比例,或者任何其他要求的比例存在。此种纤维还可具有各种不同形状,例如描述有关非常规形状纤维的授予Hogle等人的美国专利5,227,976中所描述的。
“双成分纤维”是指由至少2种聚合物从同一挤出机以共混物形式挤出形成的纤维。术语“共混物”的定义可见诸于下文。双成分纤维所包含的各种聚合物成分不是沿纤维的整个横断面面积排列在位置相对固定、彼此界限鲜明的区内,而且,各种聚合物通常也不是沿着纤维的整个长度呈连续状,而是,往往形成随机开始并随机结束的微丝(原纤)或原生原纤。双成分纤维有时也被称之为多成分纤维。这一大类纤维在例如授予Gessner的美国专利5,108,827中有所讨论。
“粘合梳理纤网”是指由短纤维按如下方法制成的纤网:将短纤维送过精梳或梳理装置,该装置将一根根短纤维分开并沿机器加工方向(纵向)排齐,从而形成大致沿纵向取向的纤维非织造纤网。此种纤维一般以成包的形式购进,并置于清棉机中将纤维打散,然后送入梳理装置。纤网成形之后,立即用1种或多种已知的粘合方法将其粘合。此类粘合方法的一种是粉末粘合,在粘合过程中,粉末状粘合剂被分散到整个纤网中,然后进行活化,通常借助以热空气对纤网和粘合剂进行加热来实现。另一种合适的粘合方法是花纹粘合,在粘合过程中,采用压花机辊筒或超声粘合设备将纤维粘合起来,粘合作用通常发生在局部的粘合花纹区域内,不过,希望的话,也可沿着整个纤网表面将其全面粘合起来。另一种合适而且著名的粘合方法,特别是当采用双组分短纤维时,就是穿透空气粘合。
“气流铺网”是一种熟知的纤维非织造层成形方法。在气流铺网过程中,一束束细小的纤维,典型的长度在约6~约19mm的范围,由一股气流吹散并夹带着前进,随后沉积在成形网上,其间通常辅以抽真空。随后,散乱沉积的纤维借助例如热空气或喷洒粘合剂而彼此粘合。
本文所使用的术语穿透空气粘合是指这样一种将纤维纤网粘合的方法,在此过程中温度足以使构成纤网中纤维的聚合物熔融的空气被强制透过纤网。空气速度在100~500英尺每分钟,停留时间可长达6s。聚合物的熔融及重新凝固提供了粘合作用。
“个人护理制品”是指尿布、训练裤、吸收作用衬裤、成人失禁用品及妇女卫生制品。
试验方法
材料的密度计算方法是:单位面积样品重量的克数(克每平方米,即gsm)除以68.9帕下样品厚度的毫米数,然后,结果乘上0.001,于是,该数值就变成了以g/cm3(g/cc)为单位的数值了。总共评估3个样品,取平均作为密度的数值。
透气性采用Frazier孔隙率试验测定。透气性是在2个布表面之间存在一定压差条件下透过材料的气流流率。样品在Frazier透气性测试仪上测定,该仪器由Frazier精密仪器公司(Gaithersburg,MD)供应。所采用的程序按照联邦试验方法,标准191A,方法5450的规定,所不同的是,样品尺寸为8英寸×8英寸(20.3×20.3cm),而不是7英寸×7英寸(17.8×17.8cm)。采用这样的较大尺寸就可以保证样品所有侧面更好地伸出到夹持环以外并有利于样品的夹牢和均匀地蒙在整个小孔上。在该程序中,空气在抽风扇的抽吸作用下穿过样品和校准的小孔。控制风扇的速度以便将透过布样的气流流率调节到使2个表面之间的压差恰好等于0.51英寸(13mm)水柱。流过样品的空气量根据校准的小孔2侧之间的压力降来确定,压力降由垂直的油气压计读出。该读数可利用仪器制造商提供的换算表换算为空气流率。结果表示为立方英尺空气每平方英尺样品每分钟,或立方厘米每平方厘米每秒。数值越高,材料透气性或孔隙率越大。
吸收时间试验指出采用8cc合成月经流体条件下材料的吸入速率。在3英寸×7英寸的测试材料样品上,浇上由流体容器的2英寸×0.5英寸排出缝隙排出的10cc合成月经流体。然后,测定吸收8cc流体的时间,以秒计。以秒计的吸收时间越短,表明该具体材料的吸入速率越快。
材料一旦被浇上流体之后,重要的是,还要测定这时的回潮量。将试验样品放在一个2层的吸收剂芯上面,以其非织造布的一面挨着吸收剂,以便模拟个人护理吸收制品,在这种情况下指月经垫或卫生巾,的包覆材料。吸收剂朝上的一面,也就是体侧层是425gsm的短绒(垫),密度为约0.07g/cc,而阻液一面的层则为470gsm的短绒,密度为约0.094g/cc。阻液一面为压花的。由带有2英寸×0.5英寸排出缝隙的流体容器排出10cm3合成月经流体。接着,在样品的顶面放上一张吸墨纸并施加1磅每平方英寸的压力,保持3min的时间。3min的间隔之后,取下吸墨纸并称重,进而测定出吸墨纸吸收的月经流体量,以克表示。数值越高,表明该具体测试材料的回潮程度越大。有关该试验的进一步讨论可参见同一受让人的美国专利5,536,555。
为了测定材料的Starrett膨松度或卡尺厚度,即有关材料的厚度,5英寸×5英寸(127mm×127mm)的材料样品在0.05磅每英寸载荷下被压实,然后,维持在压实状态下测定材料厚度。数值越高,表明材料越厚、越膨松。
详细描述
吸收制品通常包括挨着穿戴者的衬里、后片(最外层)以及,可能还有的其他层。
该衬里有时被称之为体侧衬里、包覆层或面层,并且还可紧挨着一个高峰控制材料。沿着制品的厚度方向,衬里材料是挨着穿戴者皮肤的层,因此是首先接触来自穿戴者的体液或其他流出物的层。衬里还起着将穿戴者皮肤与吸收剂结构中保持的液体隔开的作用,因此应当柔顺、手感柔软且无刺激作用。一向采用各种材料制作体侧衬里,包括微孔塑料薄膜、织物、非织造纤网、微孔泡沫塑料、网状的泡沫体,等等。衬里可采用选定用量的表面活性剂进行处理,例如,约0.28%Triton X-102表面活性剂或者进行其他方式的加工,以获得要求水平的润湿性和亲水性。若采用表面活性剂,它可以是内部添加剂,或者施涂到纤网上的,可采用任何传统施涂方法,例如,喷涂、印刷、蘸涂、刷涂等。
后片有时被称之为外包覆层,是离穿戴者最远的层。制作外包覆层的典型材料是薄的热塑性膜,如聚乙烯膜,该材料为基本不透液的。外包覆层的作用是防止保持在吸收剂结构中的身体流出物打湿或沾污穿戴者的衣服、被褥或者其他接触到个人护理制品的材料。外包覆层的其他替代结构包括被做成或经过处理,从而获得要求程度不透液性的织物或非织造纤维纤网,或者由织物或非织造布与热塑性薄膜组成的层合物。
除了完成上面所描述的各种功能的衬里和后片之外,个人护理制品用的传统吸收剂体系还可概括为具有高峰控制(S)或持液(C)的功能,或称SC功能。
高峰控制功能就是迅速接受到来的体液,然后,或者吸收、保持、传递或者以其他方式维系液体以便使其不致泄漏到制品以外。高峰层还可被称之为吸入层、转移层、输送层等等,其典型的位置是夹在体侧衬里与另一层,例如可能连接在其上的持液层之间,并与二者处于紧密、液体流通的接触状态。
持液功能就是迅速并有效地吸收流出物。提供持液功能的材料应能够将液体从分配层吸过来,并且在吸收液体的过程中不应出现因吸收剂外层的润胀而造成显著“凝胶堵塞”或阻挡液体进一步渗入到吸收剂内部。持液功能通常是由吸收剂组合物提供的,例如包含高速率超吸收性聚合物,如聚丙烯酸酯超吸收剂-短绒共混物的组合物。这类材料能迅速吸收并保持液体。
除了传统吸收剂体系中的高峰控制和持液功能之外,最近的研究成果又引入了另一种功能,它可能体现为一种夹在S(高峰)与C(持液)层之间的单独层,或者可以结合到现有材料中。这种新功能就是分配功能(D),于是产生一种具有高峰控制、分配和持液功能的体系,或称“SDC”体系。
分配功能就是将液体从最初沉积的部位转移到希望储存的部位。分配优选应以可接受的速度进行,以便使直接受液区,一般为裆部,来得及为下一次排液做好准备。2次排液之间的时间可从仅数分钟,到长达数小时,一般取决于穿戴者的年龄。可用于制作分配层的材料包括织物和非织造纤网。例如,分配层是一种由聚烯烃长丝的熔喷或纺粘纤网构成的非织造布层。
本文所描述的先进衬里不但可提供将穿戴者皮肤与液体隔开的传统衬里功能,而且还可提供多种其他有益的功能,这些功能还综合了高峰控制及分配功能中的某些特征。此种衬里为设计提供了灵活性并使个人护理制品能够做得更薄、更舒适且成本更低。
本发明人还发现,包含开孔、薄膜涂层、膨松非织造布构成的带缓冲层的吸收材料,可提供极佳的流体吸入,同时保持了低回潮值(小于1g)并具有优良的拉伸强度。
实施例
作为一个实施方案,按下述制备开孔、薄膜涂层-膨松非织造布层合物:在聚丙烯/聚乙烯并列双组分非织造布上挤出涂布0.75密耳(0.02mm)低密度聚乙烯(LDPE)薄膜。在非织造布上直接成形该薄膜,赋予了薄膜纤维似的特征。
该薄膜由Quantum化学公司(Wallingford,康涅狄格)按商品名NA206提供的聚乙烯制成。该薄膜包含约12wt%二氧化钛以遮盖杂色和减少光泽。
非织造布是50/50并列共轭纤维纤网,由道化学公司(Midland,MI)按商品名Aspun6811A提供的聚乙烯与由埃克森化学公司(休斯敦,得克萨斯)按商品名EscorenePD-3445提供的聚丙烯构成。该非织造布的单位重量为约1 osy(34gsm),由5旦按美国专利5,382,400中所描述的纺粘法生产的穿透空气粘合、高卷曲的纤维构成。将该纺粘布沿纵向(MD)拉伸约20%,与此同时将薄膜连续贴合上去,以便进一步提升层合物的纤维感外观和厚度。该非织造布的厚度为约0.07英寸(1.8mm),密度为约0.03g/cc。
该层合物采用凸起花纹辊筒及光滑钢砧辊进行开孔,其间采用的二辊间表面速度差为10∶1,辊温和速度分别为200°F(93℃)、160fpm(英尺/分)(49m/min)和170°F(77℃)、15fpm(4.6m/min)。适当选择开孔条件,使得层合物的开松度和孔隙率达到最大,同时尽量避免纤网压实。如果使用的热量和压力过大,纤网膨松度和功能将受到损害。这种开孔方法在批准的美国专利申请80/620,865中也做了讨论,在此将其全文收作参考。
开孔以后,层合物的非织造布这一面接受水溶液喷洒处理,该水溶液包含0.3wt%Osi Specialities公司(Danbury,康涅狄格)按商品名Y-12488提供的表面活性剂,它是一种聚氧化烯改性的聚二甲基硅氧烷非离子表面活性润湿剂。
对该开孔的层合物就用作卫生巾包覆层的性能做了评估,结果显示出柔软、似织物表面和极佳的流体控制特性。表中的数据表明,该层合物非常疏松,孔隙率测定值为455标准立方英尺每分钟(scfm),卡尺厚度为0.038英寸(0.97mm),吸入(时间)14.2秒,回潮0.4g。
表中作为对比的标准样是一种与实例一样的由相同聚乙烯和二氧化钛制成的开孔薄膜。该薄膜的开孔条件为,采用速度约51fpm(15.5m/min)的相同花纹辊筒和速度约25fpm(7.62m/min)的相同砧辊,温度分别为195°F(91℃)和170°F(77℃)。辊隙压力为约39psi(磅/平方英寸)。
表
标准 实例孔隙率(scfm) 715 455卡尺厚度(英寸) 0.021 0.038MD拉伸强度(磅) 0.59 0.83CD拉伸强度(磅) 0.54 0.39粘附力(kg) NA 1.98cc吸入(s) 13.3 14.2回潮(gms) 1.22 0.43
注:拉伸试验结果已规格化到1密耳薄膜厚度的当量值。
虽然,上面已介绍了本发明的一个实施方案,但不应将其视为对本发明的限制。各种各样聚合物、薄膜涂层、开孔方法等等,均可使用,且仍然视为属于本发明的范围之内。
薄膜涂层的选择应考虑能提供所要求的层合物柔软、不透明度、强度、粘附力及成本。一般地,薄膜厚度可在0.25~3密耳(0.006mm~0.076mm)范围。优选聚乙烯,因为它成本比较低,且手感柔软,不过,任何能制成薄膜的聚合物均可使用。
膨松非织造布的选择应满足可透性、回潮所要求的层合物卡尺厚度和密度,以及其他要求。希望的是,层合及开孔之前,该非织造布的厚度或膨松度应在约0.05英寸(1.27mm)~0.11英寸(2.8mm)之间,优选约0.085英寸(2.16mm),密度在约0.043g/cc~约0.019g/cc之间,优选约0.025g/cc。层合及开孔加工可能造成一定程度的压实。
一般地,非织造布的单位重量可在0.5~5osy(17gsm~174gsm)范围,微纤维纤度应小于10μm到6旦。非织造布可按照多种方法制备,包括熔喷、纺粘、粘合梳理纤网、气流铺网。推荐使用并列共轭纤维,因为此种纤维能够卷曲,而此种卷曲有助于形成膨松的纤网。聚烯烃非常适合用来制作纤维,因为其成本低且易于加工,而且有许多种类聚烯烃可供用来生产纤维。聚乙烯,如道化学公司的ASPUN6811A线型低密度聚乙烯、2553 LLDPE和25355,以及12350高密度聚乙烯便是此种合适的聚合物。上述聚乙烯的熔体流动速率分别为约26、40、25和12。成纤聚丙烯包括埃克森化学公司的EscorenePD3445聚丙烯和Montell化学公司的PF-304。市场上还有许多其他聚烯烃可供使用。
涂布方法优选采用挤出涂布,不过其他方法,如喷涂、印刷和粘合剂法也可使用。
优选的开孔方法是上面实例中描述的,然而,其他方法,如热针开孔、针刺、凸/凹冲孔/压花以及水力开孔(水刺),也可使用。
本实例中所使用的开孔方法也可在一定的温度和相对辊筒转速范围内实施。美国专利4,781,962描述了一种开孔方法,其中辊筒之间的表面速度差在0~50%之间。还有,虽然花纹辊筒一般以高于砧辊的速度旋转,然而,合格的开孔层合物也可由砧辊比花纹辊快的组合生产出来。也可使用2个花纹辊筒(的组合),亦称凸纹对凸纹雕刻。在任何一种方法中,开孔图案都应设计成可提供至少20%的开孔面积。
综上所述可以看出,本文提供一种可用作衬里的带缓冲层的吸收材料,它具有优于任何其他已知衬里的卓越强度和流体控制功能,并使穿戴者感觉柔软和舒适。这在吸收剂技术和个人护理制品的设计上代表一大进步。改良的衬里能够做成更窄,因而舒适的个人护理制品。比如尿布,窄裆式样是一种裆部宽度不足约7.6cm的设计。
除了将其作为衬里之外,本发明的带缓冲层的吸收材料还可在手术垂帘和罩衣中用作含更多纤维和不掉毛的布料、作为清洁室内台面用的毡垫,以及其他看重低掉毛和缓冲特性的用途。
虽然,上面仅就本发明的少数示范实施方案做了详细描述,然而,本领域技术人员很容易悟出,在这些示范实施方案中还蕴藏着许多修改并实质上不偏离本发明创新原理和优点的可能。因此,所有这些修改均应视为属于如下面权利要求中规定的本发明范围之内。在权利要求中,手段加功能的权利要求应视为涵盖涉及为完成所述功能所描述的构造,不限于构造等价物,而且还涵盖等价构造。譬如,虽然钉子与螺钉,就钉子利用圆柱形而螺钉利用螺旋表面将木质零件固定在一起这一点而言,不是构造等价物,然而就固定木质零件的作用而言,钉子与螺钉却可视为等价构造。
Claims (19)
1.一种带缓冲层的吸收材料,包含:膨松非织造布,在该非织造布上挤出了一层薄膜从而形成层合物,其中所述层合物开有孔,并具有至多20s的8cc吸入速率和小于1g的回潮。
2.权利要求1的材料,其中所述非织造布的厚度为至少约0.03英寸(0.76mm),密度为约0.03g/cc~约0.07g/cc。
3.权利要求2的材料,其中所述非织造布的厚度为约0.05英寸(1.3mm),密度为约0.05g/cc。
4.权利要求1的材料,其中所述开孔使得所述层合物具有至少20%的开孔面积。
5.权利要求1的材料,其中所述薄膜包含聚烯烃。
6.权利要求5的材料,其中所述薄膜还包含二氧化钛。
7.权利要求1的材料,其中所述非织造布由聚烯烃纤维构成。
8.权利要求1的材料,其中所述非织造布由共轭纤维构成。
9.权利要求8的布料,其中所述共轭纤维由聚乙烯与聚丙烯构成。
10.包含权利要求1的材料的、选自下列的个人护理制品:尿布、训练裤、吸收作用衬裤、成人失禁用品及妇女卫生制品。
11.权利要求10的制品,其中所述个人护理制品是妇女卫生制品,且所述材料是衬里。
12.权利要求10的制品,其中所述个人护理制品是成人失禁用品,且所述材料是衬里。
13.权利要求10的制品,其中所述个人护理制品是尿布,且所述材料是衬里。
14.权利要求13的尿布,它具有至多7.6cm的裆部宽度。
15.一种制造个人护理制品用体侧衬里的方法,包括下列步骤:
提供膨松非织造布;
将薄膜直接挤出到所述非织造布上,从而形成层合物;
对所述层合物实施开孔;
借此,所述层合物就具有了至多20s的8cc吸入速率和小于1g的回潮。
16.权利要求15的方法,其中所述非织造布的厚度至少约0.76mm,且密度至少约0.03g/cc。
17.权利要求15的方法,其中所述薄膜的厚度为约0.006~约0.076mm。
18.权利要求15的方法,其中所述开孔使得所述层合物具有了至少20%的开孔面积。
19.权利要求15的方法,其中所述薄膜包含二氧化钛。
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- 1997-03-28 US US08/825,452 patent/US5919177A/en not_active Expired - Lifetime
-
1998
- 1998-03-12 ZA ZA982098A patent/ZA982098B/xx unknown
- 1998-03-13 CN CN98803804A patent/CN1096938C/zh not_active Expired - Fee Related
- 1998-03-13 KR KR1019997008781A patent/KR100548098B1/ko not_active IP Right Cessation
- 1998-03-13 EP EP98911647A patent/EP0969965B1/en not_active Expired - Lifetime
- 1998-03-13 PL PL98335813A patent/PL335813A1/xx unknown
- 1998-03-13 RU RU99122523/14A patent/RU2203185C2/ru not_active IP Right Cessation
- 1998-03-13 CA CA002281902A patent/CA2281902A1/en not_active Abandoned
- 1998-03-13 TR TR1999/02377T patent/TR199902377T2/xx unknown
- 1998-03-13 ID IDW990993A patent/ID22628A/id unknown
- 1998-03-13 BR BRPI9808099-7A patent/BR9808099A/pt not_active IP Right Cessation
- 1998-03-13 AU AU65556/98A patent/AU722665B2/en not_active Ceased
- 1998-03-13 WO PCT/US1998/005018 patent/WO1998043811A1/en active IP Right Grant
- 1998-03-13 DE DE69835811T patent/DE69835811T2/de not_active Expired - Lifetime
- 1998-03-25 TW TW087104437A patent/TW453868B/zh not_active IP Right Cessation
- 1998-03-26 AR ARP980101402A patent/AR015109A1/es active IP Right Grant
- 1998-03-26 CO CO98016994A patent/CO5040048A1/es unknown
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102398399A (zh) * | 2010-08-04 | 2012-04-04 | 聚合物集团有限公司 | 透气层压品及其制备方法 |
CN102398399B (zh) * | 2010-08-04 | 2015-11-25 | 聚合物集团有限公司 | 透气层压品及其制备方法 |
CN113950313A (zh) * | 2019-04-22 | 2022-01-18 | 飞特适薄膜产品有限责任公司 | 用于吸收制品的带孔的挤出涂覆非织造布和包括其的吸收制品 |
Also Published As
Publication number | Publication date |
---|---|
TR199902377T2 (xx) | 2000-04-21 |
US5919177A (en) | 1999-07-06 |
ID22628A (id) | 1999-12-02 |
CO5040048A1 (es) | 2001-05-29 |
DE69835811T2 (de) | 2007-03-29 |
KR20010005713A (ko) | 2001-01-15 |
DE69835811D1 (de) | 2006-10-19 |
AU6555698A (en) | 1998-10-22 |
WO1998043811A1 (en) | 1998-10-08 |
CA2281902A1 (en) | 1998-10-08 |
CN1096938C (zh) | 2002-12-25 |
ZA982098B (en) | 1998-09-16 |
BR9808099A (pt) | 2000-03-08 |
EP0969965B1 (en) | 2006-09-06 |
PL335813A1 (en) | 2000-05-22 |
RU2203185C2 (ru) | 2003-04-27 |
TW453868B (en) | 2001-09-11 |
EP0969965A1 (en) | 2000-01-12 |
KR100548098B1 (ko) | 2006-02-02 |
AU722665B2 (en) | 2000-08-10 |
AR015109A1 (es) | 2001-04-18 |
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